Voltage reduction idea help

Hi All,

In addition to Triac control, Is there any other simple method to reduce the 220V/50Hz to 180V AC for a bypass high speed motor( 22000 RPM) with out disturbing the wave form.. Bcoz triac device will spoil the motor life.

Expecting your valuable guidance please....

Thanks in advance

That's what transformers are for.

It's called a Variac.